Saw The Hunger Games. I feel like the movie was good, and of the parts of the book that they left in, they did really well. The actors did a really good job. I especially like Stanley Tucci's character Caesar Flickerman. A lot of the internal conflict that you get to see in the book is left out, but I feel like they did a good job with what they did leave in. I think it is one of those situations where it's like "Enjoy the movie? Would you like to know more? Read the book."
I think the movie might be a little hard to follow if you haven't read the book. I think they tried to cram a lot of story in a short movie.
Worth seeing though.
Also, if you like the concept of teens forced to fight to the death and have a little stronger stomach for violence, check out Battle Royale.